Hints for forwords in main

Hints

• asv-cid-maybe-not-rdns
  :4 - easy.learn.forwords
  The component ID might not follow the reverse domain-name schema (the TLD used by it is not known to the validator).
• asv-content-rating-missing
  -
  This component has no `content_rating` tag to provide age rating information. You can generate the tag data online by answering a few questions at https://hughsie.github.io/oars/